<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
    private $_id;
    
    /**
     * Authenticates a user.
     * @return boolean whether authentication succeeds.
     */
    public function authenticate()
    {
        $user = User::model()->findByAttributes(array('login'=>$this->username));
        
        if($user===NULL)
            $this->errorCode=self::ERROR_USERNAME_INVALID;
        else if($user->password!==crypt($this->password,$user->salt))
            $this->errorCode=self::ERROR_PASSWORD_INVALID;
        else
        {
            $this->_id = $user->id;
            $this->errorCode=self::ERROR_NONE;
        }
        return !$this->errorCode;
    }
}